i'm gut renovating an apartment and trying to decide what to put in the kitchen. i would love a filtered hot/cold water dispenser, but i've never had one before and i have no idea if a single system even exists. i have heard of reverse osmosis - do i need that as well? or does anyone sell a system that does it all: filters, heats, and chills? also, any idea how much space i need to accomodate all this? i don't really need cold filtered water, since i can just add ice. is there a system that filters and heats water but also dispenses room temperature filtered water? TIA!